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Performance evaluation and comparison of a novel “retro-fit” heat exchanger and a conventional solar water heater with a single coiled heat exchanger

Biomedical Sciences Research Institute Computer Science Research Institute Environmental Sciences Research Institute Nanotechnology & Advanced Materials Research Institute

Nchelatebe Nkwetta, D and Smyth, Mervyn (2012) Performance evaluation and comparison of a novel “retro-fit” heat exchanger and a conventional solar water heater with a single coiled heat exchanger. Journal of Renewable and Sustainable Energy, 4 (2). pp. 1-16. [Journal article]

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URL: http://jrse.aip.org/resource/1/jrsebh/v4/i2/p023103_s1?isAuthorized=no

DOI: 10.1063/1.3687940

Abstract

The performances of solar water heating systems have improved steadily over recent years due to improved component quality and design. Solar water heating systems in Northern Maritime climates, however, are still not viable economically. In order to make a significant impact on the domestic hot water heating market, solar water heaters must be innovative, cost-effective, and adaptable for retro-fit installation. This paper investigates experimentally the performance of a novel heat exchanger (the “Solasyphon”) designed and developed for external connection to an existing traditional single-coil hot water cylinder. The connection of the novel heat exchanger to an existing system reduces the cost of installation as it avoids the need to replace the existing single-coil hot water cylinder with a twin-coil system. However, the connection of this Solasyphon to a solar water heating system has negative effects on heat losses especially at higher temperatures based on the size of the solar collector. The experimentation was carried out under outdoor and indoor control operating conditions. This paper presents the monitored performance of the Solasyphon compared with that of a conventional solar water heater with a coiled heat exchanger and the negative effects regarding the heat losses resulting from the small size of the solar collector especially at high inlet temperatures (greater than 70 °C).

Item Type:Journal article
Faculties and Schools:Faculty of Art, Design and the Built Environment
Faculty of Art, Design and the Built Environment > School of the Built Environment
Research Institutes and Groups:Built Environment Research Institute
Built Environment Research Institute > Centre for Sustainable Technologies (CST)
ID Code:21864
Deposited By:Dr Mervyn Smyth
Deposited On:16 Apr 2012 09:18
Last Modified:04 Mar 2014 15:40

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